+++ /dev/null
-/*
- * Copyright 2008, 2010 Freescale Semiconductor, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- */
-
-#include <common.h>
-#include <asm/fsl_ddr_sdram.h>
-
-#include "ddr.h"
-
-/* Board-specific functions defined in each board's ddr.c */
-extern void fsl_ddr_board_options(memctl_options_t *popts,
- dimm_params_t *pdimm,
- unsigned int ctrl_num);
-
-unsigned int populate_memctl_options(int all_DIMMs_registered,
- memctl_options_t *popts,
- dimm_params_t *pdimm,
- unsigned int ctrl_num)
-{
- unsigned int i;
- const char *p;
-
- /* Chip select options. */
-
- /* Pick chip-select local options. */
- for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
- /* If not DDR2, odt_rd_cfg and odt_wr_cfg need to be 0. */
-
- /* only for single CS? */
- popts->cs_local_opts[i].odt_rd_cfg = 0;
-
- popts->cs_local_opts[i].odt_wr_cfg = 1;
- popts->cs_local_opts[i].auto_precharge = 0;
- }
-
- /* Pick interleaving mode. */
-
- /*
- * 0 = no interleaving
- * 1 = interleaving between 2 controllers
- */
- popts->memctl_interleaving = 0;
-
- /*
- * 0 = cacheline
- * 1 = page
- * 2 = (logical) bank
- * 3 = superbank (only if CS interleaving is enabled)
- */
- popts->memctl_interleaving_mode = 0;
-
- /*
- * 0: cacheline: bit 30 of the 36-bit physical addr selects the memctl
- * 1: page: bit to the left of the column bits selects the memctl
- * 2: bank: bit to the left of the bank bits selects the memctl
- * 3: superbank: bit to the left of the chip select selects the memctl
- *
- * NOTE: ba_intlv (rank interleaving) is independent of memory
- * controller interleaving; it is only within a memory controller.
- * Must use superbank interleaving if rank interleaving is used and
- * memory controller interleaving is enabled.
- */
-
- /*
- * 0 = no
- * 0x40 = CS0,CS1
- * 0x20 = CS2,CS3
- * 0x60 = CS0,CS1 + CS2,CS3
- * 0x04 = CS0,CS1,CS2,CS3
- */
- popts->ba_intlv_ctl = 0;
-
- /* Memory Organization Parameters */
- popts->registered_dimm_en = all_DIMMs_registered;
-
- /* Operational Mode Paramters */
-
- /* Pick ECC modes */
-#ifdef CONFIG_DDR_ECC
- popts->ECC_mode = 1; /* 0 = disabled, 1 = enabled */
-#else
- popts->ECC_mode = 0; /* 0 = disabled, 1 = enabled */
-#endif
- popts->ECC_init_using_memctl = 1; /* 0 = use DMA, 1 = use memctl */
-
- /*
- * Choose DQS config
- * 0 for DDR1
- * 1 for DDR2
- */
-#if defined(CONFIG_FSL_DDR1)
- popts->DQS_config = 0;
-#elif defined(CONFIG_FSL_DDR2) || defined(CONFIG_FSL_DDR3)
- popts->DQS_config = 1;
-#endif
-
- /* Choose self-refresh during sleep. */
- popts->self_refresh_in_sleep = 1;
-
- /* Choose dynamic power management mode. */
- popts->dynamic_power = 0;
-
- /* 0 = 64-bit, 1 = 32-bit, 2 = 16-bit */
- popts->data_bus_width = 0;
-
- /* Choose burst length. */
-#if defined(CONFIG_FSL_DDR3)
-#if defined(CONFIG_E500MC)
- popts->OTF_burst_chop_en = 0; /* on-the-fly burst chop disable */
- popts->burst_length = DDR_BL8; /* Fixed 8-beat burst len */
-#else
- popts->OTF_burst_chop_en = 1; /* on-the-fly burst chop */
- popts->burst_length = DDR_OTF; /* on-the-fly BC4 and BL8 */
-#endif
-#else
- popts->burst_length = DDR_BL4; /* has to be 4 for DDR2 */
-#endif
-
- /* Choose ddr controller address mirror mode */
-#if defined(CONFIG_FSL_DDR3)
- popts->mirrored_dimm = pdimm[0].mirrored_dimm;
-#endif
-
- /* Global Timing Parameters. */
- debug("mclk_ps = %u ps\n", get_memory_clk_period_ps());
-
- /* Pick a caslat override. */
- popts->cas_latency_override = 0;
- popts->cas_latency_override_value = 3;
- if (popts->cas_latency_override) {
- debug("using caslat override value = %u\n",
- popts->cas_latency_override_value);
- }
-
- /* Decide whether to use the computed derated latency */
- popts->use_derated_caslat = 0;
-
- /* Choose an additive latency. */
- popts->additive_latency_override = 0;
- popts->additive_latency_override_value = 3;
- if (popts->additive_latency_override) {
- debug("using additive latency override value = %u\n",
- popts->additive_latency_override_value);
- }
-
- /*
- * 2T_EN setting
- *
- * Factors to consider for 2T_EN:
- * - number of DIMMs installed
- * - number of components, number of active ranks
- * - how much time you want to spend playing around
- */
- popts->twoT_en = 0;
- popts->threeT_en = 0;
-
- /*
- * BSTTOPRE precharge interval
- *
- * Set this to 0 for global auto precharge
- *
- * FIXME: Should this be configured in picoseconds?
- * Why it should be in ps: better understanding of this
- * relative to actual DRAM timing parameters such as tRAS.
- * e.g. tRAS(min) = 40 ns
- */
- popts->bstopre = 0x100;
-
- /* Minimum CKE pulse width -- tCKE(MIN) */
- popts->tCKE_clock_pulse_width_ps
- = mclk_to_picos(FSL_DDR_MIN_TCKE_PULSE_WIDTH_DDR);
-
- /*
- * Window for four activates -- tFAW
- *
- * FIXME: UM: applies only to DDR2/DDR3 with eight logical banks only
- * FIXME: varies depending upon number of column addresses or data
- * FIXME: width, was considering looking at pdimm->primary_sdram_width
- */
-#if defined(CONFIG_FSL_DDR1)
- popts->tFAW_window_four_activates_ps = mclk_to_picos(1);
-
-#elif defined(CONFIG_FSL_DDR2)
- /*
- * x4/x8; some datasheets have 35000
- * x16 wide columns only? Use 50000?
- */
- popts->tFAW_window_four_activates_ps = 37500;
-
-#elif defined(CONFIG_FSL_DDR3)
- popts->tFAW_window_four_activates_ps = pdimm[0].tFAW_ps;
-#endif
- popts->zq_en = 0;
- popts->wrlvl_en = 0;
-#if defined(CONFIG_FSL_DDR3)
- /*
- * due to ddr3 dimm is fly-by topology
- * we suggest to enable write leveling to
- * meet the tQDSS under different loading.
- */
- popts->wrlvl_en = 1;
- popts->wrlvl_override = 0;
-#endif
-
- /*
- * Check interleaving configuration from environment.
- * Please refer to doc/README.fsl-ddr for the detail.
- *
- * If memory controller interleaving is enabled, then the data
- * bus widths must be programmed identically for the 2 memory
- * controllers.
- *
- * XXX: Attempt to set both controllers to the same chip select
- * interleaving mode. It will do a best effort to get the
- * requested ranks interleaved together such that the result
- * should be a subset of the requested configuration.
- */
-#if (CONFIG_NUM_DDR_CONTROLLERS > 1)
- if ((p = getenv("memctl_intlv_ctl")) != NULL) {
- if (pdimm[0].n_ranks == 0) {
- printf("There is no rank on CS0. Because only rank on "
- "CS0 and ranks chip-select interleaved with CS0"
- " are controller interleaved, force non memory "
- "controller interleaving\n");
- popts->memctl_interleaving = 0;
- } else {
- popts->memctl_interleaving = 1;
- if (strcmp(p, "cacheline") == 0)
- popts->memctl_interleaving_mode =
- FSL_DDR_CACHE_LINE_INTERLEAVING;
- else if (strcmp(p, "page") == 0)
- popts->memctl_interleaving_mode =
- FSL_DDR_PAGE_INTERLEAVING;
- else if (strcmp(p, "bank") == 0)
- popts->memctl_interleaving_mode =
- FSL_DDR_BANK_INTERLEAVING;
- else if (strcmp(p, "superbank") == 0)
- popts->memctl_interleaving_mode =
- FSL_DDR_SUPERBANK_INTERLEAVING;
- else
- popts->memctl_interleaving_mode =
- simple_strtoul(p, NULL, 0);
- }
- }
-#endif
-
- if( ((p = getenv("ba_intlv_ctl")) != NULL) &&
- (CONFIG_CHIP_SELECTS_PER_CTRL > 1)) {
- if (strcmp(p, "cs0_cs1") == 0)
- popts->ba_intlv_ctl = FSL_DDR_CS0_CS1;
- else if (strcmp(p, "cs2_cs3") == 0)
- popts->ba_intlv_ctl = FSL_DDR_CS2_CS3;
- else if (strcmp(p, "cs0_cs1_and_cs2_cs3") == 0)
- popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_AND_CS2_CS3;
- else if (strcmp(p, "cs0_cs1_cs2_cs3") == 0)
- popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_CS2_CS3;
- else
- popts->ba_intlv_ctl = simple_strtoul(p, NULL, 0);
-
- switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) {
- case FSL_DDR_CS0_CS1_CS2_CS3:
- case FSL_DDR_CS0_CS1:
- if (pdimm[0].n_ranks != 2) {
- popts->ba_intlv_ctl = 0;
- printf("Not enough bank(chip-select) for "
- "CS0+CS1, force non-interleaving!\n");
- }
- break;
- case FSL_DDR_CS2_CS3:
- if (pdimm[1].n_ranks !=2){
- popts->ba_intlv_ctl = 0;
- printf("Not enough bank(CS) for CS2+CS3, "
- "force non-interleaving!\n");
- }
- break;
- case FSL_DDR_CS0_CS1_AND_CS2_CS3:
- if ((pdimm[0].n_ranks != 2)||(pdimm[1].n_ranks != 2)) {
- popts->ba_intlv_ctl = 0;
- printf("Not enough bank(CS) for CS0+CS1 or "
- "CS2+CS3, force non-interleaving!\n");
- }
- break;
- default:
- popts->ba_intlv_ctl = 0;
- break;
- }
- }
-
- fsl_ddr_board_options(popts, pdimm, ctrl_num);
-
- return 0;
-}
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